The diameter of a microburst.

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Multiple Choice

The diameter of a microburst.

Explanation:
Microbursts are tiny, intense downdrafts whose damaging winds reach the ground over a very small area. The standard definition uses a diameter of about 2.5 miles or less to distinguish microbursts from larger downburst events. That’s why the correct choice is 2.5 miles or less. The other options either allow a footprint that’s too large (which would describe macrobursts) or are too restrictive to cover typical microburst sizes.

Microbursts are tiny, intense downdrafts whose damaging winds reach the ground over a very small area. The standard definition uses a diameter of about 2.5 miles or less to distinguish microbursts from larger downburst events. That’s why the correct choice is 2.5 miles or less. The other options either allow a footprint that’s too large (which would describe macrobursts) or are too restrictive to cover typical microburst sizes.

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